US4754300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined electrographic printer, copier, and telefax machine
Assignee: Intel Corp
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Filing: 1987-06-09
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Granted: 1988-06-28
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Expires: 2007-06-09
Abstract
Abstract An electrographic printing apparatus capable of functioning as a copier, printer, and telefax machine is disclosed. The electrographic printing apparatus includes a photoconductive member, preferably a horizontally mounted photoconductive belt, a developer unit for developing an electrostatic latent image on the photoconductive member, and a biased transfer roller to transfer the developed electrostatic latent image to a sheet of copy material. The apparatus also includes an optical print head which can receive information from a local or a remote source to form the electrostatic latent image on the photoconductive member and thus act as a printer. The apparatus further includes a device for scanning an original document and for projecting the scanned image either onto the photoconductive member or onto a CCD linear array. When the scanned image is projected onto the photoconductive member, a copy of the original document is made. When the image is projected onto the CCD linear array, the scanned image is digitized and sent via the telephone lines in the manner of a telefax machine.
Inventors
- 👤 Kensuke Fukae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; G; G03; G03G; G03G15/00; G03G15/04; G03G15/04036; G03G15/04045; G03G15/04054; G03G15/04072; G03G15/22; G03G15/221; H; H04; H04N; H04N1/00; H04N1/00127; H04N1/00249; H04N1/00254
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
143 words
An electrographic printing apparatus, comprising a housing, a photoconductive member, means for uniformly charging said photoconductive member, means for selectively discharging said photoconductive member in response to information received from a local or a remote source, scanning means for scanning an original document and producing an image corresponding to information contained on said original document, image sensing means for converting said image to a data stream and for transmitting said data stream to a remote location, and projecting means for projecting said image onto said photoconductive member to discharge selected portions of said photoconductive member and onto said image sensing means, wherein said electrographic printing apparatus is switchable between printing information received form a local source, printing information received from a remote source, scanning and copying an original document, and scanning and transmitting an image of an original document to a remote location.
Claim 2
Dependent Claim
143 words
An electrographic printing apparatus, comprising a housing, a photoconductive member, means for uniformly charging said photoconductive member, means for selectively discharging said photoconductive member in response to information received from a local or a remote source, scanning means for scanning an original document and producing an image corresponding to information contained on said original document, image sensing means for converting said image to a data stream and for transmitting said data stream to a remote location, and projecting means for projecting said image onto said photoconductive member to discharge selected portions of said photoconductive member and onto said image sensing means, wherein said electrographic printing apparatus is switchable between printing information received form a local source, printing information received from a remote source, scanning and copying an original document, and scanning and transmitting an image of an original document to a remote location.
Claim 3
Dependent Claim
38 words
The apparatus of claim 1 further comprising a source of copy material, means for developing said electrostatic latent image on said photoconductive member, and means for transferring said developed image from said photoconductive member to said copy material.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1 wherein said photoconductive member comprises a photoconductive belt.
Claim 5
Dependent Claim
15 words
The apparatus of claim 3 wherein said photoconductive belt is mounted horizontally within said housing.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 wherein said selective discharge means comprises an optical print head.
Claim 7
Dependent Claim
14 words
The apparatus of claim 5 wherein said optical print head comprises an LED array.
Claim 8
Dependent Claim
15 words
The apparatus of claim 5 wherein said optical print head comprises a laser light source.
Claim 9
Dependent Claim
15 words
The apparatus of claim 1 wherein said image sensing means comprises a CCD linear array.
Claim 10
Dependent Claim
14 words
The apparatus of claim 2 wherein said transfer means comprises a biased transfer roller.
Claim 11
Dependent Claim
22 words
The apparatus of claim 9 wherein said transfer roller is biased at a voltage in the range of +24V to about +100V.
Claim 12
Dependent Claim
19 words
The apparatus of claim 1 wherein said projecting means comprises an optical fiber bundle having an adjustable focal length.
Claim 13
Dependent Claim
168 words
An electrographic printing apparatus, comprising a housing, a photoconductive member, means for uniformly charging said photoconductive member, means for selectively discharging said photoconductive member to form a first electrostatic latent image on said photoconductive member, scanning means for scanning an original document and producing a scanned image of said original document, image sensing means for converting said scanned image to a data stream and for transmitting said data stream to a remote location, projecting means for projecting said scanned image onto said photoconductive member to form a second electrostatic latent image thereon, and for projecting said scanned image onto said image sensing means, means for developing said first and second latent electrostatic images, and means for transferring the developed electrostatic latent image to said copy material, wherein said electrographic printing apparatus is switchable between printing information received from a local source, printing information received from a remote source, scanning and copying an original document, and scanning and transmitting an image of an original document to a remote location.
Claim 14
Dependent Claim
168 words
An electrographic printing apparatus, comprising a housing, a photoconductive member, means for uniformly charging said photoconductive member, means for selectively discharging said photoconductive member to form a first electrostatic latent image on said photoconductive member, scanning means for scanning an original document and producing a scanned image of said original document, image sensing means for converting said scanned image to a data stream and for transmitting said data stream to a remote location, projecting means for projecting said scanned image onto said photoconductive member to form a second electrostatic latent image thereon, and for projecting said scanned image onto said image sensing means, means for developing said first and second latent electrostatic images, and means for transferring the developed electrostatic latent image to said copy material, wherein said electrographic printing apparatus is switchable between printing information received from a local source, printing information received from a remote source, scanning and copying an original document, and scanning and transmitting an image of an original document to a remote location.
Claim 15
Dependent Claim
22 words
The apparatus of claim 12 wherein said photoconductive member comprises a photoconductive belt, said photoconductive belt being horizontally disposed in said housing.
Claim 16
Dependent Claim
15 words
The apparatus of claim 13 wherein said image sensing means comprises a CCD linear array.
Claim 17
Dependent Claim
15 words
The apparatus of claim 14 wherein said selective discharge means comprises an optical print head.
Claim 18
Dependent Claim
14 words
The apparatus of claim 15 wherein said transfer means comprises a biased transfer roller.
Claim 19
Dependent Claim
21 words
The apparatus of claim 16 wherein said transfer roller is biased at a voltage in the range of +24V to +100V.
Claim 20
Dependent Claim
19 words
The apparatus of claim 17 wherein said projecting means comprises an optic fiber bundle having an adjustable focal length.
Claim 21
Dependent Claim
82 words
An electrographic printing apparatus, comprising a housing, a source of copy material, a photoconductive member, means for uniformly charging said photoconductive member, means for discharging selected portions of said photoconductive member to form a latent electrostatic image thereon, means for developing said electrostatic latent image on said photoconductive member, and means for transferring the developed electrostatic latent image to said copy material, said transfer means comprising a transfer roller biased at a voltage in the range of about +24V to about +100V.
Claim 22
Dependent Claim
82 words
An electrographic printing apparatus, comprising a housing, a source of copy material, a photoconductive member, means for uniformly charging said photoconductive member, means for discharging selected portions of said photoconductive member to form a latent electrostatic image thereon, means for developing said electrostatic latent image on said photoconductive member, and means for transferring the developed electrostatic latent image to said copy material, said transfer means comprising a transfer roller biased at a voltage in the range of about +24V to about +100V.
Claim 23
Dependent Claim
21 words
The electrographic printing apparatus of claim 19 wherein said transfer roller is made from a metal or a conductive plastic material.
Claim 24
Dependent Claim
18 words
The electrographic printing apparatus of claim 20 wherein said transfer roller presses said sheet against said photoconductive member.
References Cited (Backward Citations)
US3907421A
Cited
US4268157A
Cited
US4291341A
Cited
US4398816A
Cited
US4446472A
Cited
US4389655A
Cited
US4402591A
Cited
US4401383A
Cited
US4432632A
Cited
US4527885A
Cited
US4470693A
Cited
US4502064A
Cited
US4640601A
Cited
US4556308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |